COMPRESSORS, GAS TURBINES AND JET ENGINES QUIZ

The efficiency and work ratio of a gas turbine plant can be increased by

Reheating the air after partial expansion in the turbine

Injecting water in/around combustion chamber

Adding heat exchanger

All of these

TRUE ANSWER : ?
YOUR ANSWER : ?

An air receiver is to be placed outside. Should it be placed in

Enclosed room

Rain

Sun

Shade

TRUE ANSWER : ?
YOUR ANSWER : ?

In a centrifugal compressor, the ratio of the ________ to the blade velocity is called slip factor.

Inlet velocity of flow

Inlet whirl velocity

Outlet whirl velocity

Outlet velocity of flow

TRUE ANSWER : ?
YOUR ANSWER : ?

It is not possible to use closed gas turbine cycle in aeronautical engines because

None of these

It is inefficient

It is bulky

It requires cooling water for its operation

TRUE ANSWER : ?
YOUR ANSWER : ?

For perfect intercooling in a two stage compressor

p₂/p₁ = p₃/p₂

p₁ = p₂ p3

p₁ = p3

p₁/p₃ = p₂/p₁

TRUE ANSWER : ?
YOUR ANSWER : ?

High air-fuel ratio in gas turbines

Reduces exhaust temperature

Do not damage turbine blades

Increases power output

Improves thermal efficiency

TRUE ANSWER : ?
YOUR ANSWER : ?

The net work input required for compressor with increase in clearance volume

Remains same

Decreases

Increases/decreases depending on compressor capacity

Increases

TRUE ANSWER : ?
YOUR ANSWER : ?

Volumetric efficiency of a compressor decreases with ________ in compression ratio.

Does not change

Remain same

Increase

Decrease

TRUE ANSWER : ?
YOUR ANSWER : ?

Gas turbine cycle with regenerator

Decreases heat loss is exhaust

Allows high compression ratio

Increases thermal efficiency

Allows operation at very high altitudes

TRUE ANSWER : ?
YOUR ANSWER : ?

Propulsive efficiency is defined as ratio of

Thrust power and fuel energy

Engine output and propulsive power

Thrust power and propulsive power

Propulsive power and fuel input

TRUE ANSWER : ?
YOUR ANSWER : ?

↑